Massrename is general purpose utility for batch-renaming all files of a suffix to a different suffix. eg: renaming all *.txt files in a directory to *.doc. Also supports renaming a string within a file with the --within argument.

Provisioning and Mediation Solutions:
Collection and validation of CDRs
Collating
Correlation of different input sources CDRs
Aggregation of partial CDRs related to the same call
Format change and CDRs normalization
Business transformation of data